The crystal structures of the title compounds were determined by single crystal X-ray diffraction techniques. The molecule of the Z isomer, which crystallizes in the monoclinic space group C2/c with Z = 4 in a cell of dimensions a = 14.891(2), b = 10.780(2), c = 8.769(1) Angstrom, beta = 97.47(2)degrees, V = 1395.7(7) Angstrom(3), has crystallographic twofold symmetry. The E form crystallizes in the orthorhombic space group Pbca with a = 11.730(1), b = 6.932(1), c = 16.841(1) Angstrom, V = 1369.4(2) Angstrom(3), and Z = 4, Its molecules have crystallographically dictated 1 symmetry. In both isomers the phenyl rings are roughly perpendicular to the average ethylene plane. The atoms characterizing this plane show significant deviations from planarity in the Z isomer. Marked bond-angle distortions at the ethene carbons of both structures are observed. The H-1 and C-13 NMR spectra of the compounds were measured and, particularly in the case of the H-1 chemical shifts, fall into two quite separate spectral regions. At low temperature, two conformational isomers, those with different relative orientation of the C-Cl bonds of the phenyl rings, are observed in the spectrum of each compound.

CRYSTAL AND MOLECULAR-STRUCTURE OF Z- AND E-1,2-DICHLORO-1,2-BIS(2-CHLOROPHENYL)ETHYLENE. AN X-RAY AND NMR STUDY / Antolini, Luciano; Folli, Ugo; Iarossi, Dario; Mucci, Adele; Sbardellati, S; Taddei, Ferdinando. - In: CANADIAN JOURNAL OF CHEMISTRY. - ISSN 0008-4042. - STAMPA. - 73:(1995), pp. 1520-1525.

CRYSTAL AND MOLECULAR-STRUCTURE OF Z- AND E-1,2-DICHLORO-1,2-BIS(2-CHLOROPHENYL)ETHYLENE. AN X-RAY AND NMR STUDY

ANTOLINI, Luciano;FOLLI, Ugo;IAROSSI, Dario;MUCCI, Adele;TADDEI, Ferdinando
1995

Abstract

The crystal structures of the title compounds were determined by single crystal X-ray diffraction techniques. The molecule of the Z isomer, which crystallizes in the monoclinic space group C2/c with Z = 4 in a cell of dimensions a = 14.891(2), b = 10.780(2), c = 8.769(1) Angstrom, beta = 97.47(2)degrees, V = 1395.7(7) Angstrom(3), has crystallographic twofold symmetry. The E form crystallizes in the orthorhombic space group Pbca with a = 11.730(1), b = 6.932(1), c = 16.841(1) Angstrom, V = 1369.4(2) Angstrom(3), and Z = 4, Its molecules have crystallographically dictated 1 symmetry. In both isomers the phenyl rings are roughly perpendicular to the average ethylene plane. The atoms characterizing this plane show significant deviations from planarity in the Z isomer. Marked bond-angle distortions at the ethene carbons of both structures are observed. The H-1 and C-13 NMR spectra of the compounds were measured and, particularly in the case of the H-1 chemical shifts, fall into two quite separate spectral regions. At low temperature, two conformational isomers, those with different relative orientation of the C-Cl bonds of the phenyl rings, are observed in the spectrum of each compound.
1995
73
1520
1525
CRYSTAL AND MOLECULAR-STRUCTURE OF Z- AND E-1,2-DICHLORO-1,2-BIS(2-CHLOROPHENYL)ETHYLENE. AN X-RAY AND NMR STUDY / Antolini, Luciano; Folli, Ugo; Iarossi, Dario; Mucci, Adele; Sbardellati, S; Taddei, Ferdinando. - In: CANADIAN JOURNAL OF CHEMISTRY. - ISSN 0008-4042. - STAMPA. - 73:(1995), pp. 1520-1525.
Antolini, Luciano; Folli, Ugo; Iarossi, Dario; Mucci, Adele; Sbardellati, S; Taddei, Ferdinando
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/9879
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